For the reaction given below: $\mathrm{CoCl}_{3} . \mathrm{xNH}_{3}+\mathrm{AgNO}_{3}(\mathrm{aq}) \rightarrow$ If two equivalents of AgCl precipitate out, then the value of $x$ will be ____.

JEE Main · 2022 · 29 Jun 2022 · Shift 2 · Coordination Compounds

For the reaction given below:

CoCl_{3} . xNH_{3} + AgNO_{3} (aq) \to

If two equivalents of AgCl precipitate out, then the value of

x

will be ____.

Answer: 5

Solution

When

CoCl_{3} . xNH_{3}

reacts with

AgNO_{3}

and produces 2 moles of AgCl precipitate, it means 2 chloride ions are present outside the coordination sphere (ionizable). The complex must be

[Co (NH_{3})_{5} Cl] Cl_{2}

, where one Cl is inside the coordination sphere and two Cl are counter ions. Therefore,

x = 5

JEE Main · 2022 · 29 Jun 2022 · Shift 2 · Integer answer

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